Humidifier



FIG. 1 is a front, top and left side perspective view of a humidifier showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and

FIG. 8 is a front, top and left side perspective view thereof, with the lid shown open, the trough pulled up, and one of the blowholes rotated. 

The ornamental design for a humidifier, substantially as shown and described. 